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<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <a href="http://localhost:3000/index?a=1&b=2">get请求(query参数)</a>
  <a href="http://localhost:3000/user/2">get请求(params/path参数)</a>
  <form action="http://localhost:3000/index" method="post">
    <input type="text" name="b">
    <input type="text" name="c">
    <input type="submit" value="post请求">
  </form>
</body>
</html>